Locked-packing pump plunger



H. M. GREEN LOCKED PACKING PUMP PLUNGER Filed April 1o. v1924 H.' GREEN n LOCKED PACKING PUMP PLUNGER Filed April lo'D 1921@ *ad M y? 6 a Y al,

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aww Z Patented July 21, 1925.

HENRY M. GREEN, or Los ANGELES, CALIFORNIA.L

LooKED-PACKING lPUMP PLUNGEE.

Application filed April 1o, 1924. serial No. 7055s?.

To all whom t may concern.'

Be it knownthat I', HENRY M. GREEN, a citizen of the United States, residing at Los Angeles, inthe county of Los Angeles and Statel of California, have invented new andl useful Improvements in Locked-Packing Pump Plungers, of which the following is a specification. l

This invention relates to deep well and other plunger pumps and more particularly to plungers. y An object is to having a substantially continuous tubular body upon which there is mounted a plural- 15 ity of expansible packers made for instance of hemp, and'an object is to provide means for assembling the tion on the tubular ody."

Another object of this invention is to assemble a series of cups on a tubularbody, there being an expansible packingdisposed lin the cups and locked therein against removal by means of liners, -which also serve to'space the cups from each other, the whole series of cups being held in locked position. f I v Another object is to provide unit packers, consisting of a cup with a liner locking the packing in position',

locking the packing in position within the cu Fig. 7 is a vertical cross section of the cup, with packing and liner in position. 5o The plunger of this invention includes Aa tubular body proportions, the lower endpof the tube being provided with threads 2a, and the uppackers in' locked posiso that the packingv -cup'may be easily assembled orA disassembled o thimble 3.

showing-the successive steps of placing and- 2v-of suitable dimensions andV per endl with threads 2". the lower threads 2a which is bored out to form a chamber 3a an- 'nularly around the contiguous part-of the body 2.

On the upper end of the plunger body 2 is screwed a working valve 4. Below this valve there is run on the threads a follower 5 consisting of .an internally threaded collar. Loosely slidable along the smooth outer A surface ofthe body 2 is a seriesl of collarprovide a pump plungerv like packing cups 6, the cavities of which areall set in one direction and adapted to receive an expansible cylindrical body of packing 7, which may be of any suitable soft material, such as'hemp. The lower end of the packing 7 is disposed within the cup 6, the upperen'd of the packing 7 is free to expand from4 the absorptionof the liquid in the barrel, within which the tubular bodyis disposed to form therewith a fluidtight seal, as will be understood.

The packing 7 is firmly locked in position within the cups 6 by means of a sleevelikev liner 8 surrounding the tubular body '2.` The liner 8 hasits lower end inwardly tapered, as at 8a, and rests -upon the bottom of the cup 6, which, to provide 'further retaining means for the packing, is provided is screwed a thimble 3 one end of on its interior wall with circular grooves 6,

As will be seen from Fig. `3, the -packing 7 forms an expanded lower end in the cup 6 and also engages 'the grooves 6 and'will be thus securely locked against removal from the cup ception of te lowermostvcup, rests upon a sleeve liner 8 and the whole series of packing cups with the packing, packing unit when the follower ,5

forms one continuous v6. Each cup 6, with the' exscrewed down upon the tubular body 'lockin the entire series of cups against the I prefer to assemble the packing andthe liner in each individual cup, as shown in Figs. 4 to 7 inclusive, in which 9 represents a cuplike form, preferably made of;

metal, having -a reduced central` cuplike chamber 9a. The packing cup 6 is disposed within the form 9 and a cylindrical rod 10 is centrally placed in the cuplike chamber 9*?. The soft packing 7 is next placed within the cup 6 and a sleeve 11, tapered at its lower end l1a and snugly fitting the rod 10,

is pushed down over the rod 10, down to the bottom of the chamber 9a. The object of this manipulation to4 compress in part the packing 7 and move it toward the walls of the cup 6. l

The next step is to place the sleevelike liner 8 over the sleeve l1, which it tits snug- 1y, and force it down through the packing 7, the tapered ends 8a ot' the liner 8 will serve to force the packing toward the walls lof the cup and the circular grooves 61. At

of the liquid with which it comes in contact. As the packing cups of the opposite ends become worn, the packing ot' adjacent cups will successively expand and -lorin a liquid tight seal. lVheie it is desired to replace the packing, it is only necessary to remove the thiinble 3, slip ott' lthe packing cups 6 and replace t-liem with'cups with fresh packing.

From the above it will be seen thatv I have provided pump plunger having a series vof longitudinally spaced and independently mounted expansible packers, the packing ot each packing cup being subJected to a substantially equal degree ot' compression, and

which will therefore operate to expand with approximately equal frictional pressure against the pump cylinder or barrel in which the plunger may be working, it is successively called into service, as explained above.

l Various changes in the construction and arrangement may be made by those skilled inthe art Without departing from the spirit ofmy invention, as claimed.

cups in assembled position on the tubular body.

Q In a plunger, the combination of a tubular body, packing cups mounted thereon, cach cup being provided with an ex pansible packer, and a sleeve liner surrounding the tubular body and engaging the bottom of the cups and locking the packing within the cup, said liners serving to space the cups from each other on the tubular body, and means for locking the cups and liners in assembled position on thc tubular body.

3. In a plunger, the combination of a.

tubular body, a series of packer retaining units mounted along the body, means for locking the packer within the units and spacing them from each other, and` means for locking the units in assembled position on the tubular body. Y

4. In a plunger, the combination of a tubular body, a thimble attached to the lower end ot the body, a follower threaded on the upper end of the body, and a series ot independently mounted expansible packers arranged in spaced relation along the body, cups having chambersreceiving the end ot one packer and liners between the cups surrounding thc body, said liners locking the packers within the cups and spacing the cups from eachother, whereby the series of cups and the packers may be locked in spaced relation upon the body. i

In testimony whereofv I have signed my name to this'specification.

H. M. GREEN.A 

